Becoming parents, and what it does to a couple

Longitudinal studies of couples having a first child find an average decline in relationship satisfaction, and it is one of the more replicated findings in the field. Knowing it in advance appears to help.

What the research shows

Meta-analytic work reports a moderate average decline in relationship satisfaction following the transition to parenthood, larger for mothers than for fathers in most samples.

The decline is on average. Variation is wide, and a minority of couples report improvement.

Some of the decline is also observed in couples without children over comparable periods, which means part of it reflects relationship duration rather than parenthood specifically. The transition appears to accelerate a trend rather than create one.

The factors associated with steeper decline are reasonably consistent: an unplanned pregnancy, pre-existing relationship difficulty, low support, and a division of labour that shifts more sharply than expected.

The mechanisms

Sleep. Underrated in every discussion of this. Sustained sleep restriction affects mood regulation, patience and the capacity to respond generously, all of which are the raw material of a relationship.

Much of what couples interpret as a change in feeling during the first year is a change in sleep.

Time. The available hours for the relationship fall to near zero, and what remains is spent on logistics.

Division of labour. The most consistent finding in this area is that couples become more traditional in their division of domestic and care work after a first child, frequently more than either intended.

The gap between the arrangement expected and the arrangement that emerges is strongly associated with dissatisfaction, particularly for mothers.

Identity. Both people are becoming something new, at different rates, with different visible losses.

What appears to help

Discussing the division of labour specifically, before the birth. Not in principle — in detail, including nights, sick days, who reduces hours, and who does the noticing.

Couples who do this report smaller gaps between expectation and reality, which is the variable that matters.

Protecting sleep as a shared resource. Arrangements that allow each parent a block of uninterrupted sleep, even at some cost to convenience, do more for a relationship in the first year than anything else on this list.

Support beyond the couple. Two people attempting to do this alone is a historically unusual arrangement and it is harder than it is generally presented.

Small, unambitious time together. Twenty minutes with no phone, not an evening out, since the evening out will not happen for a while.

Naming the phase. Couples who understand the decline as common and largely temporary tend to interpret it less catastrophically, which affects how they behave during it.

The recovery

The finding that is generally left out of the alarming version.

Satisfaction tends to recover as children become less physically demanding, and long-term studies do not find parenthood associated with worse relationship outcomes over a full life course.

The difficult period is real and it is a period.

What is worth watching for

Some things during this transition are not phase effects.

Postnatal depression and anxiety, which affect a significant proportion of mothers and a smaller but real proportion of fathers, and which are treatable.

The signs that warrant assessment: persistent low mood beyond the first fortnight, inability to sleep even when the baby does, loss of interest, intrusive frightening thoughts, or feeling unable to cope.

This is a medical matter rather than a relationship one, and it is frequently misattributed to the relationship.

An arrangement that is not shifting. A temporary imbalance during the newborn period is expected. One that has persisted for two years is not a phase, and it is worth addressing as a standing arrangement rather than waiting.

Contempt appearing. Exhausted people argue badly. Contempt is different from arguing badly, and its arrival during this period is worth taking seriously rather than attributing to tiredness.

General information about relationships and wellbeing, not medical advice. If you are struggling after a birth, contact your midwife, health visitor or doctor.